Probability of combined events — practice question

Bag $A$ and bag $B$ each hold red sweets and yellow sweets. Anna chooses one sweet at random from bag $A$, and Ben chooses one sweet at random from bag $B$. The chance that Anna selects a red sweet is $\frac{2}{5}$. The probability that Anna and Ben both select a yellow sweet is $\frac{1}{10}$.